<?php

/**
 * Class WPML_Page_Builders_Register_Strings
 */
abstract class WPML_Page_Builders_Register_Strings {

	/**
	 * @var IWPML_Page_Builders_Translatable_Nodes
	 */
	private $translatable_nodes;

	/**
	 * @var IWPML_Page_Builders_Data_Settings
	 */
	protected $data_settings;

	/**
	 * @var WPML_PB_String_Registration
	 */
	private $string_registration;

	/** @var WPML_PB_Reuse_Translations_By_Strategy|null $reuse_translations */
	private $reuse_translations;

	/** @var int $string_location */
	private $string_location;

	/** @var int $group_index */
	private $group_index;

	public function __construct(
		IWPML_Page_Builders_Translatable_Nodes $translatable_nodes,
		IWPML_Page_Builders_Data_Settings $data_settings,
		WPML_PB_String_Registration $string_registration,
		WPML_PB_Reuse_Translations_By_Strategy $reuse_translations = null
	) {

		$this->data_settings       = $data_settings;
		$this->translatable_nodes  = $translatable_nodes;
		$this->string_registration = $string_registration;
		$this->reuse_translations  = $reuse_translations;
	}

	/**
	 * @param WP_Post $post
	 * @param array   $package
	 */
	public function register_strings( WP_Post $post, array $package ) {

		do_action( 'wpml_start_string_package_registration', $package );

		$this->string_location = 1;
		$this->group_index     = 0;

		if ( $this->data_settings->is_handling_post( $post->ID ) ) {

			if ( $this->reuse_translations ) {
				$existing_strings = $this->reuse_translations->get_strings( $post->ID );
				$this->reuse_translations->set_original_strings( $existing_strings );
			}

			$data = get_post_meta( $post->ID, $this->data_settings->get_meta_field(), false );

			if ( $data ) {
				$converted = $this->data_settings->convert_data_to_array( $data );
				if ( is_array( $converted ) ) {
					$this->register_strings_for_modules(
						$converted,
						$package
					);
				}
			}

			if ( $this->reuse_translations ) {
				$this->reuse_translations->find_and_reuse( $post->ID, $existing_strings );
			}
		}

		do_action( 'wpml_delete_unused_package_strings', $package );
	}

	/**
	 * @param string $node_id
	 * @param mixed  $element
	 * @param array  $package
	 */
	protected function register_strings_for_node( $node_id, $element, array $package ) {
		$strings = $this->translatable_nodes->get( $node_id, $element );
		foreach ( $strings as $string ) {
			$string = $this->filter_string_to_register( $string, $node_id, $element, $package );

			$this->string_registration->register_string(
				$package['post_id'],
				$string->get_value(),
				$string->get_editor_type(),
				$string->get_title(),
				$string->get_name(),
				$this->string_location,
				$string->get_wrap_tag(),
				$this->group_index
			);

			$this->string_location++;
		}

		$this->group_index ++;
	}

	/**
	 * @param WPML_PB_String $string
	 * @param string         $node_id
	 * @param mixed          $element
	 * @param array          $package
	 *
	 * @return WPML_PB_String
	 */
	protected function filter_string_to_register( WPML_PB_String $string, $node_id, $element, $package ) {
		return $string;
	}

	/**
	 * @param array $data_array
	 * @param array $package
	 */
	abstract protected function register_strings_for_modules( array $data_array, array $package );
}